Combined generator and ringer for telephones.



No. 633,l46. Patented Sept. I9, I899.

J. a, NOLEN. COMBINED GENERATOR AND RINGER FOR TELEPHONES.

(Application filed June 30. 1898.)

(No Model.)

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UNITED STATES PATENT OFFICE.

JAMES G. NOLEN, OF CLEVELAND, OHIO, ASSIGNOR OF ONE-IIALF TO CHARLES E.ARTHUR, OF SAME PLACE.

COMBINED GENERATOR AND RINGER FOR TELEPHONES.

SPECIFICATION forming part of Letters IPatent No. 633,146, datedSeptember 19, 1899.

Application filed June 30,1898. Serial No. 684,796. (No model.)

T at whom it may concern;

Be it known that I, J AMES G. NoLEN, acitizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented certain new and useful Improvements in a Combined Generator andRinger for Telephones, of which the following is a specification,reference being had therein to the accompanying drawings.

The invention has reference to new and useful improvements intelephones, and relates particularly to a novel combination of some ofthe telephone parts, whereby certain beneficial results hereinafter setforth are obtained.

One of the essential objects of my invention is to so arrange andcombine the generator and ringermechanisms in an instrument of the typereferred to that the usual polarizing-magnet employed for the fields ofthe ringer mechanism will be entirely dispensed with, together withnumerous contacts and connections that heretofore necessarily have beenemployed.

A further object of the invention is to provide means whereby thestrength of the polarizing-n1agnet may be increased or diminished, asoccasion may require.

\Vith these objects in view my invention consists, broadly, in socombining the generator and ringer mechanisms as to permit of theutilization of the field magnet or magnets of the generator as thepolarizing-magnet for the fields of the ringer, whereby a device isobtained the use of which dispenses with the necessity of the usualringer-magnet and of numerous contacts and connections that have been anecessity in telephone construction.

The invention further consists in means for varying the location of theringer mechanism with respect to the field-magnets of the generator,whereby the strength of the polariz ing-magnet may be varied as desired.

The invention still further consists in various details of construction,as will be more fully hereinafter set forth and shown in the drawings,in which Figure l is a section through a telephonegenerator, taken online 00 00, Fig. 2, illustrating the ringer-coils as located between theparallel members or legs of one of the generator-magnets, which is thepreferable arrangement. Fig. 2 is an end elevation of my combinedgenerator and ringer. Fig. 3 is a plan view of the ringer mechanism withthe top of the generator-magnet removed to more fully illustrate themethod of arrangement of the coils. Fig. a is a modification of theparts shown in Fig. 8, illustrating the preferable method of securingthe coils to the generatormagnet; and Fig. 5 is an end elevation of themechanism shown in Fig. at.

In Fig. 1, A and 13 represent the permanent field-magnets of thegenerator, the magnets being doubled and of the usual horseshoe type.They are clamped together by means of U shaped plates C C upon eitherside of the magnets and carry the usual pole-blocks D D.

E is an armature of ordinary formation, the shaft of which has suit-ablebearings in the end plates F and G. At one end the armature-shaftcarries the gear-wheel II and at the other end the contact-piece I,which is shown to abut against the usual spring J, attached toa portionof the telephone-casing K.

In my improved mechanism the shaft L, carrying the usual gear M, whichmeshes with the pinion ll, extends but half-way through the generator,so as to permit of the location of the field-coils, hereinafter referredto, within one of the generator-magnets. An up right support N, securedto the blocks D 1), supports the shaft L at one end, and a similarbracket 0, formed, preferably, integral with the end plate F, forms abearing for the shaft at the other end.

Within the field-magnet B of the generator and between the parallelmembers or legs thereof I preferably arrange the usual fieldcoils I ofthe ringer mechanism in such manner that the cores of the coils will bemagnetized by the permanent magnet of the generator acting as apolarizing-magnet. The

usual magnet of the type last referred to is thus entirely dispensedwith.

Means are also provided whereby the ringer-magnets may be moved to orfrom the poles of the generatormagnet. The mechanism preferably employedcomprises a supporting-bracket, in which the coils are adapted to becarried, so constructed and arranged as to be capable of a verticaladjustment between the legs of one of the generator-magnets. By movingthe ringer-magnets in proximity to the magnetpoles of the generator themagnetization of the cores of the ringer-magnets is increased. Thisresul t is frequently desired,as perm auent magnets in the course oftime lose to some extent their magnetic strength.

In one style of construction the supportingbracket just referred to isin the form of an inverted U, comprising rear transverse portions c a,which are connected by a brass yoke 7), side pieces 0 c, which areadapted to bear against the inner faces of the generatormagnet, frontportions (1 d, in which are arranged binding-posts e c, andrearwardly-extendingarms ff, which abutagainst the outer faces of theparallel members of the generator and are adapted to be clamped to thelegs of the field-magnet by means of the screws g g. The side pieces 0 ccarry at their forward ends hubs it h, which are bored, as shown by thedotted lines in Fig. 3, to receive the cores 2' i. The cores justreferred to extend through the hubs and through apertures formed for thesame in the side plates 0 c, as shown by the dotted lines, so as to forma contact with the inner portions of the generator-magnet. The cores areheld in proper position by means of set-screwsjj in the hubs. Upon thecores are arranged the field-coils P of the ringer mechanism, the coilsbeing wound in the usual manner and the ends of said coils being securedto the binding-posts c e.

The letter Q designates the usual armature, pivotally supported in theyoke b, which extends between the coils and carries the striker R.

In Figs. 4: and 5 a modified type of securing mechanism for thefield-coils of the ringer mechanism is shown, which type is on accountof its simplicity preferable in use, as it can be readily attached tothe field-magnet of the generator. In the modification the ringer-coilsare arranged within the field-magnet of the generator in such mannerthat the cores of the coils are parallel with the legs of the magnetinstead of being at right angles thereto, as in Fig. 3. By thisarrangement longer coils may be employed and superior results obtained.The letters A B designate the modified form of ringer-coils arrangedbetween the legs of the magnet B, the cores a and b of which arearranged parallel to the parallel members of said magnet. The front endsof the cores referred to are provided with transverse portions 0 and d,which are preferably integral with the cores and adapted to be incontact with and to be clamped tightly against the legs of thegenerator-magnet. A brass cross-piece c connects the transverse members.The rear portions of the coils referred to are supported by means of atransverse rod or strap f, said strap being apertured at g g to permitthe rear portions of the cores a and b to extend therethrough. The strapis further provided with forwardlyextending arms 7t h, which projectbeyond the legs of the magnet and extend through apertures formed forthe same in the transverse portions 0 d of the cores. The arms justdescribed are threaded attheir free ends to receive clamping-nuts "/It", by means of which the coils are tightly clamped in their properposition between the legs of the field magnet of the generator. Drepresents a t-ransversely-arranged armature which is pivotallysupported upon a lugj upon the strap f. Slots are formed in the strapreferred to and in the brass connecting-bar a, through which extends theclapper or striker E, which in turn is secured to the armature.

It is to be observed that while I have shown and described two methodsof combining the generator and ringer mechanisms I do not desire to belimited to the exact construction shown, as other methods may be adoptedwithout departing from the spirit of my invention, which consists in socombining the ringer mechanism of a telephone with the usualtelephone-generator that the field-magnets of the latter will beutilized as the polarizing-magnet for the former, whereby, as before setforth, numerous parts which have heretofore been found necessary in theconstruction of telephones are entirely dispensed with and superiorresults are obtained. It will likewise be observed that by housing theringer mechanism within the generator field-magnets an increase in themagnetic inertia or retardation of the ringer-coils will be obtainedthrough the presence of the large quantity of iron and steel in thegenerator. This result is very desirable in high-wound and bridge work,as in working telephones in multiple or bridge it is important thatbesides a high resistance a high coefficient of self-induction shouldalso be obtained in the coils to prevent the voice-currents from leakingthrough on the bridge-circuits.

Having thus described my invention, what I claim, and desire to secureby Letters Patcut, is

1. A combined generator and ringer for telephones, comprising asignal-current generator provided with one or more field-magnets, asupporting-frame adj ustably secured to one of said magnets, a ringermechanism, the fieldmagnets of which are arranged within thesupporting-bracket, and connections between the ringer-magnets and thelegs of one of the generator-magnets, substantially as described.

2. Aconnbined generatorandringerfortelei one of the generator-magnets,substantially [0 phones, comprising a signal-current generaas described.tor, provided with one or more field-magnets, In testimony whereof Iaffix my signature asnpporting-frame arranged between thelegs inpresence of two Witnesses. of one of said magnets and adjustably securedthereto, a ringer mechanism, the field-mag- JAMES NOLEN' nets of Whichare arranged between the sup- Witnesses:

porting-bracket, and connections between the l JHARLES L. STOCKER,

l L. J. \Vrrrr'rmronn.

cores of the ringer-magnets and the legs of

